Guy was fiddling with his "phone" 10 seconds before the shooting. Looks like he was unfolding the "phone" at his side after pretending to look at it.
Yes. I went back and looked and you are right about that. He pumps and presses. he phone would be too big to conceal in his palm. The girl sight blocker? surely she can be identified but it seems as though law enforcement has their man already. What a joke, but it is DS mormon/mason territory out there.
Can't see the sniper, but I can see the the guy behind pump, shoot, gun smoke, bail out and those next to him react. Not playing the official story game of simplest explanation.